APA (7th ed.) Citation

Cannie, J. K., & Caplin, D. (1991). Keeping customers for life (AMA membership ed.). American Management Association.

Chicago Style (17th ed.) Citation

Cannie, Joan Koob, and Donald Caplin. Keeping Customers for Life. AMA membership ed. New York, NY: American Management Association, 1991.

MLA (9th ed.) Citation

Cannie, Joan Koob, and Donald Caplin. Keeping Customers for Life. AMA membership ed. American Management Association, 1991.